This is terrific review, detailed, insightful, and useful. I totally left that sentence hanging at the start there, and fixed it now.

The other minor comments have been noted.

Now, to your questions!

Most projects don't publish daily or weekly updates anywhere, which is totally understandable. Actifit adds our tags when their update is significant, which it often is.

For the vast majority of projects, publishing an update with the frequency Actifit does so would result in many empty updates. We, at Utopian, are at a very active stage in our development, and we couldn't sustain a daily update that would interest anyone. Actifit has the "Top Daily Actifitters" leaderboard to anchor the daily post, as it is of great interest to their users. Most projects don't have a true equivalent.

We've definitely had periods with more contributions by project owners and official project accounts. I would guess that right now, with the market as it is, it may not be worth the effort for them. I strongly suspect V2 will shift that.